Correct Answer: 4, 3, 2,1, 5

Solution : Given:
1. Heist 2. Height 3. Heart 4. Hackle 5. Higher

Step 1: Compare the first, and second letter of each word. Since all the words start with the same letter H then move on to the next letter.
Step 2: The second letter of each word is a , e , or i . Based on the alphabetical order of these letters, we can arrange them –  H a ckle, H e ist, H e ight, H e art, H i gher
Step 3: Compare the third letter of (He i st, He i ght, He a rt). He a rt will come before He i st, He i ght in the sequence as a comes before i in the alphabetical system.
Step 4: Compare the fourth letter of (Hei s t, Hei g ht). Hei g ht will come before Hei s t in the sequence as g comes before s in the alphabetical system.

So, the sequence is Hackle, Heart, Height, Heist, Higher, or 4,3,2,1,5. Hence, the first option is correct.